Apparatus for building hollow cushion tires



APPARATUS FOR BUILDING HOLLOW CUSHTON TIRES Filed D60 1922 Hay Patented .fan. 2'2, 1925.

ErOODRIOI-l'. COMPANY, OF

NEW'YORK, N. Y., A CQRTEORATION 1F NEW YGRK.

APEARLATUS FOR BUILDING; HOLLOW? CUSHION TIRES.

.applicatioirnled December 9, 1922., Serial Ito. 605,300.

1 loaZZ whom it may concern:

1 .Be it known that 1, JOHN li/LSTRAUB, a citizen of the United States, residing at Akron, in the county of Summit and State ;of@hio,,have invented a certain new and useful Apparatus for .Building Hollow Cushion Tires, ofv whichthe following is a specification.

;This invention relates to apparatus for 'buildingjhollow cushion tiresiandv particularly to means for supporting a series of .coreimembers or arcuate core sections in association with a tire base so that the tire body may be built upon the tire base and; core sections and the latter subsequently withdrawn through the base to leave a cavity or cavities in the tire body.

Its general object is to provide improved means for so holding the core members in association with the tire base as to avoid displacement of the core members during the building of the tire-body thereon. A further object is to provide, with suitable core member, holding means therefor which may readily be removed after the tire-body is built and before vulcanization thereof, so that the built up the and the core members therein constitute a structure having a substantially cylindrical inner periphery, permitting the vulcanization of the tire in molds of such types as are commonly used for solid tires.

Of the accompanying drawings:

Fig. 1 is a side elevation of a tire base, cavity-forming core sections, and holding means therefor, embodying a preferred form of my invention.

Fig. 2 is a sectional perspective view, sectioned on line 22 of Fig. 1.

Fig. 3 is a plan view of the free end portions of the core-holding device.

Referring to the drawings, 10 is an annular metal rim or tire base, of generally cylindrical form, divided into two annular side portions or members, 11, 12, by a circumferentially aligned series of longitudinal slots, one of said slots being shown at 13 in Fig. 2. The slots 13 alternate with narrow cross-webs or bridges 1 1, 14; which connect the side members 11, 12 and act as spacing means therefor, and preferably are integral therewith.

Assembled with the tire base is a sectional core comprising arcuate sections 15, 15 adapted to be mounted end to end in the slots 13, one end of .each section being cut away so as to overlap one of thebridges 1 1 while throughoutthe rest ofits length its inner face is substantially flush with that of the tire-base 10. N ear the other end of each core section is a cavity lfirecessed from the inner periphery thereof, said cavity being traversed by a cross-pin 17.

Seating against the inner. peripheryof the tire base 10 is a eontractible metal ring 18, transversely split as shown at 19, each of its ends, at the split, having secured thereto a short bridge-plate 2O spanning the split 19 toprevent; relative radial displace ment of said ends although permitting the ring to be contracted for insertion in the tire base. Along the median line of the ring is a circun'iferential series of short slots, 21, 21 of such number and spacing as to be registerable with the cavities 16 of the core sections 15. The inner face of each core section 15 rests against the ring 18 and the core section is securely fastened thereto by a bolt- 22 having a hooked end 22 engaging the pin 17, said bolt extending from said core section through one of the slots 21 of the ring 18, and being provided at its opposite end with a clamping nut 23.

The bolts 22 securely hold the core sections against the ring 18, lateral movement of the core sections is prevented by the sides of the slots 13, and circumferential creeping of said sections is prevented by the bridges 14:- Vfith the base and core thus assembled, a tire-body may be built thereon by progressive application of unvulcanized rubber strips, and any excess stock trimmed therefrom, as in common practice, the structure being suitably supported, as by a spider, and rotated.

The tire-body being thus formed the nuts 23 and bolts 22 are removed and the ring 18 contracted and withdrawn from the tire base. The tire is then vulcanized in a mold under heat and pressure in the usual manner, and after vulcanization the core section 15 are removed from the tire by Withdrawing them through the slots 13 in the tire base.

Modifications may be resorted to without departing from the scope of my invention, and I do not wholly limit my claims to the exact embodiment shown.

I claim:

1. Apparatus for building a cushion tire,

said apparatus comprising a tire-base structure adapted to become apart of the finished tire and including a pair of annular, spaced apart side-portions, a set of core-members mounted between said side-portions and projectingi from the outer periphery thereof, core-retaining means abutting an inner face of said tire-base structure, and means for detachably securing said core-members to said 'cdre-retaining means.

2. Apparatus for building a cushion tire, said apparatus comprising a tire-base structure adapted to become a part of the finished tire and including a pair of annular, spaced apart side-portions, a set of core-members mounted between said side-portions, projecting from the outer periphery thereof and constituting a substantially annular 'core, a transversely split ring fitting within said tire-base structure, and formed with apertures, and boltsin said apertures adapted to secure said core members to said rlug.

3. Apparatus for building a cushion tire, said apparatus comprising a tire-base formed with radially disposed apertures, a set of core members respectively mounted in said apertures and projecting from the outer periphery of said tire-base and having inner faces substantially flush with an inner face of the tire-base, a substantially annular member fitting within the tire-base, and bolts securing said core members to said substantially annular member.

4. Apparatus for building a cushion tire, said apparatus comprising a tire-base formed with a series of longitudinal slots separated by cross-bridges, a set of core members mounted in said slots, projecting from the outer periphery of the tire base and overlapping said cross-bridges so as to constitute a substantially complete annular core, a transversely split ring fitting within said tire-base, and means for clamping said core members to said ring.

In Witness whereof I have hereunto set my hand this 1st day of December 1922 JOHN M. STRAUB. 

